Improvement in spark-arresters



PATENT; OFFICE.

ruoMAs D. KENDRIOK, or BOSTON, MASSACHUSETTS.

IMPROVEMENT IN SPARK-ARRESTERS.

Specification forming part of Letters Patent No. 139,509, dated June 3, 1873 application filed March 22, 1873.

To all whom it may concern:

Be it known that I, THOMAS D. KENDRIGK, of Boston, in the county of Suii'olk and State of Massachusetts, have invented certain new and useful Improvements in Spark-Arresters; and Ldo hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being bad to the accompanying drawings which form part of this specification.

.My invention relates to a new and useful apparatus for arresting the sparks in a'locomotive or other smoke-stack, consisting in a suitable vessel placed somewhere in the center of the smoke-stack, or it may be attached to the inside circumference of the smoke-stack. The said vessel is filled with water of the same pressure as the contents of the boiler. A pipe,

A provided with a suitable valve or stop-cock,

connects the aforesaid vessel in the smokestack with the Water in the boiler. The water is forced out through a narrow annular opening from the vessel placed in the smoke-stack, and the sparks, ascending upward, are therefore obliged to pass through a thin sheet of water, whereby they are speedily extinguished. ()n the drawing, Figure 1 represents a ground plan, and Fig. 2 a central longitudinal section, of a locomotive boiler and smoke-stack. A

Similar letters refer to similar parts wherever they occur on the different parts of the drawing.

a/represents the boiler, and b the smokechamber. a is the smoke-stack, in the usual manner. In the smoke-Stack c I place the inverted conical vessel 01, as shown in Fig. 2.

,. cover, or its equivalent, e, between which and the upper end of the vessel 01 is left a narrow annular space, f, through which the water from the boiler a is forced out as a thin sheet all round the narrow opening f. The cover e may be adjusted so as to increase or decrease the width of the space f by means of the screw g and nuts h,0r their equivalents, when required. The conical vessel d stands in communication with the water in boiler a by means A of the connecting-pipe 'i, as shown, provided with a suitable valve or stop-cock, k, by which The vessel d is provided at the top with a the water from the boiler a may be whollyor partially shut 011 from the vessel d, as may be m .is to prevent the sparks and cinders from cutting and wearing out the lower surface of said vessel 01, and also for the purpose of conducting the sparks and cinders properly against the sheet of water issuing from the annular space f, where the said sparks are speedily extinguished.

I do not confine myself to the exact location of the vessel d, as shown in the drawing,as I may place it higher or lower, as may be required, in different kinds of chimneys; or I may place it attached to one side of thechimney instead of in the middle, in which case I would not require a full circular exit, f, but

only part of a circular opening,large enough so as to cover with a sheet of water the whole passage of the chimney where the said vessel was located.

By means of this simple apparatus I am able to prevent any ignited sparks or cinders from passing by the sheet or spray of water issuing from the opening f. When the engine is not running I shut thewa-ter off from the A vessel d by means of the stop-cock k and rod 1, as heretofore described.

What I wish to secure by Letters Patent,

v and claim, is-

A vessel, d, provided with an annular or partial opening, f, through which asheet oi water is forced for the purpose of extinguishing sparks and cinders, the said vessel (1 being in communication with the water in the boiler by means of the pipe t, stop-cock or cut-ofl' k, and rod Z, as herein setforth and described:

In testimony that I claim the foregoing I have hereunto set my hand this 14th day of March, 1873.

THOMAS D. xEnDRIoK.

- Witnesses:

ALB AN ANDREN, JOHN L. TUCKER, 

